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Summary— Twenty-nine patients with symptomatic segmental renal disorders were studied by regional renography. Twenty-three patients had duplex kidneys and 6 had other segmental disease. Abnormal gamma camera findings included ureteroureteric reflux, vesicoureteric reflux, impaired function, obstruction and non-obstructive dilatation. Comparison between renography and radiology in duplex kidneys showed agreement in 10 cases. In 7 kidneys the gamma camera provided additional information and in 6 cases the X-rays alone were abnormal.

It is concluded that regional renography should be performed wherever possible to complement conventional radiology in the functional and urodynamic evaluation of segmental renal disease.